var newData = [];
var oldData = [];


// update
var updated = newData.filter(row => {
    var oldRow = oldData.find(row2 => row2.id === row.id)
    return oldRow && diff(row, oldRow)
});

// new
var new = newData.filter(row => {
    return !oldData.find(row2 => row2.id === row.id);
});

// deleted
var deleted = oldData.filter(row => {
    return !newData.find(row2 => row2.id === row.id);
});